/Engine/Plugins/Experimental/Mutable/Source/MutableTools/Public/MuT/NodeImageProject.h
Set the angle-based fading behaviour for this projector. It must be set separately for RGB and Alpha channels of the images to project.Bydefault it is enabled for all channels. Disabling the angle fade will still use the AngleFadeEnd below to clamp the projection, but it will ignore the start angle, so it will not apply a fading gradient.
void SetAngleFadeChannels ( bool bFadeRGB, bool bFadeA )